flex通过url传参至as脚本中

（注：采用fb4 beta1开发，由于兼容问题，可以适当加以修改放到自己的环境中，测试的时候需要放到服务器上面，本人的测试url为
http://127.0.0.1/astest/asjs.html?msnum=13112345678）
mxml文件：
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" creationComplete="application1_creationCompleteHandler(event)" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo" minWidth="1024" minHeight="768">
 <fx:Script>
  <![CDATA[
   import mx.controls.Alert;
   import mx.events.FlexEvent;
   
   private var tempParam:String;
   protected function application1_creationCompleteHandler(event:FlexEvent):void
   {
    var param:String=ExternalInterface.call("test");
    if(param!=""){
     tempParam=param;
    }
    handlerParam();
   }
   
   private function handlerParam():void{
    testText.text=tempParam;
   }
  ]]>
 </fx:Script>
 <s:TextInput id="testText" x="23" y="34" width="198" height="31"/> 
</s:Application>
index.template.html模板文件需要添加的js代码：
var tempparam="";
   var localurl2 = location.href;
   function getParameter(paraStr, url)
   {
       var result = "";
       var str = "&" + url.split("?")[1];
       var paraName = paraStr + "=";
       if(str.indexOf("&"+paraName)!=-1)
       {
           if(str.substring(str.indexOf(paraName),str.length).indexOf("&"